Developing a continuous flow-square wave voltammetry method for determination of atrazine in soil solutions using the hanging mercury drop electrode

Journal of the Brazilian Chemical Society

Santos, Luciana B. O. dos¹  Masini, Jorge C.¹  Universidade de São Paulo, São Paulo, Brazil¹  Abate, Gilberto¹ 

关键词: continuous flow;    atrazine;    soil solution;    square wave voltametry;   

DOI  :  10.1590/S0103-50532006000100005

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

This work describes the development of a Continuous Flow-Square Wave Voltammetry method for determination of atrazine using the hanging mercury drop electrode. The best signal to noise ratio was obtained at the square wave frequency of 350 Hz and flow rate of 0.47 mL min-1. Under these conditions, the analytical curve obtained in 0.010 mol L-1 CaCl2 soil extracts in presence of 40 mmol L-1 BR buffer and 0.25 mol L-1 NaNO3 was linear for atrazine concentrations between 0.10 and 2.0 µg mL-1, with detection and quantification limits of 0.030 and 0.10 µg mL-1, respectively. The proposed method increased the analytical throughput in comparison with the batch methodology, allowing a sampling frequency of 72 h-1 to be accomplished. Besides, the sample consumption is significantly reduced, and only 341 µL are necessary for each analysis. The results obtained were similar to the ones obtained by HPLC, but the proposed method is faster and does not use organic solvents.

【 授权许可】

Unknown